/*
 * Copyright (c) 2017, 2021, Oracle and/or its affiliates.
 *
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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package com.oracle.truffle.llvm.runtime.nodes.asm.syscall;

import com.oracle.truffle.llvm.runtime.LLVMSyscallEntry;
import com.oracle.truffle.llvm.runtime.memory.LLVMSyscallOperationNode;
import com.oracle.truffle.llvm.runtime.nodes.asm.syscall.posix.LLVMPosixCallNode;
import com.oracle.truffle.llvm.runtime.nodes.asm.syscall.posix.LLVMPosixCallNodeGen;

/**
 * Performs a native syscall.
 */
public class LLVMNativeSyscallNode extends LLVMSyscallOperationNode {

    private final long nr;
    private final LLVMSyscallEntry syscallValue;
    @Child private LLVMPosixCallNode syscall;

    public LLVMNativeSyscallNode(long nr) {
        this(nr, null);
    }

    public LLVMNativeSyscallNode(LLVMSyscallEntry syscall) {
        this(syscall.value(), syscall);
    }

    private LLVMNativeSyscallNode(long nr, LLVMSyscallEntry syscallValue) {
        this.nr = nr;
        this.syscallValue = syscallValue;
        this.syscall = LLVMPosixCallNodeGen.create("syscall", "(SINT64, POINTER, POINTER, POINTER, POINTER, POINTER, POINTER):SINT64");
    }

    @Override
    public final String getName() {
        if (syscallValue != null) {
            return syscallValue.toString();
        }
        return "native_syscall(" + nr + ")";
    }

    @Override
    public long executeLong(Object rdi, Object rsi, Object rdx, Object r10, Object r8, Object r9) {
        return (long) syscall.execute(nr, rdi, rsi, rdx, r10, r8, r9);
    }
}
